import { BlueNode } from '@blue-labs/language';
import { ContractBundle } from './contract-bundle.js';
import { ChannelEventCheckpoint } from '../model/index.js';
import { DocumentProcessingRuntime } from '../runtime/document-processing-runtime.js';
export declare class CheckpointRecord {
    readonly markerKey: string;
    readonly checkpoint: ChannelEventCheckpoint;
    readonly channelKey: string;
    lastEventNode: BlueNode | null;
    lastEventSignature: string | null;
    constructor(markerKey: string, checkpoint: ChannelEventCheckpoint, channelKey: string, lastEventNode: BlueNode | null, lastEventSignature: string | null);
    matches(signature: string | null | undefined): boolean;
}
export declare class CheckpointManager {
    private readonly runtime;
    private readonly signatureFn;
    constructor(runtime: DocumentProcessingRuntime, signatureFn: (node: BlueNode | null) => string | null);
    ensureCheckpointMarker(scopePath: string, bundle: ContractBundle): void;
    findCheckpoint(bundle: ContractBundle, channelKey: string): CheckpointRecord | null;
    isDuplicate(record: CheckpointRecord | null, signature: string | null | undefined): boolean;
    persist(scopePath: string, bundle: ContractBundle, record: CheckpointRecord | null, eventSignature: string | null, eventNode: BlueNode | null): void;
}
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